Suzuki phase in two-dimensional sonic crystals - art. no. 064303

In analogy with the structures discovered by Suzuki in alkali halides, in t his article we introduce a two-dimensional acoustic system consisting of a periodic distribution of impurities (vacancies) in a host array. A triangul ar lattice of cylindrical sound scatterers is chosen as the host. The sonic crystal, called the Suzuki phase, shows extraordinary sound transmission p roperties: it holds the attenuation bands of the host structure and it also presents additional ones associated to the periodicity of the missing cyli nders. The experiments agree with predictions based on the calculated acous tic band structure and they are explained by an analysis of eigenstates.